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Pollution and Global Warming

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Pollution and Global Warming The Beginning The Earth was formed 4,6 billion years ago and its temperature has always been changing. But since the 19th century, its ... – PowerPoint PPT presentation

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Title: Pollution and Global Warming


1
Pollution and Global Warming
2
The Beginning
  • The Earth was formed 4,6 billion years ago and
    its temperature has always been changing. But
    since the 19th century, its temperature has been
    changing rapidly, and it becomes apparent that
    human beings, not nature, are causing this. This
    process is known as global warming.

3
  • Ever since people started burning coal to produce
    energy, gas emissions have been constantly
    increasing, as new technologies have been based
    on these principles. The Earth is now hotter than
    in the last millennium.

4
The Ice Caps
  • The melting ice caps are the most visible effects
    of global warming. The more ice caps melt, the
    more the worldwide ocean levels rise, and many
    continents could be flooded.

5
  • Apart from the rising oceans, other problems
    could be the extinction of polar species, such as
    polar bears, penguins and seals, and the simple
    fact that if we dont have glaciers to reflect
    the suns energy, our oceans will heat up and
    melt the ice caps even faster.

6
  • This is the Triftgletscher glacier, in
    Switzerland. Ever since 1948, it has been melting
    slowly, but the full effects were only noticed
    when a large part of it disappeared from 2002 to
    2003.

7
Meteorological Extremes
  • Global warming can cause extreme meteorological
    conditions worldwide. While natural disasters
    such as hurricanes, floods and earthquakes have
    been taking place since the beginning of the
    Earth, they are intensifying and becoming more
    frequent with global warming.

8
  • Among these hurricanes is Hurricane Katrina, one
    of the deadliest hurricanes of all time and the
    sixth biggest hurricane in history, which killed
    1836 people in 2005.

9
  • Floods have increased in recent years. Hard rains
    and an increase in overall water levels threaten
    not only peoples houses, but also entire
    countries.

10
  • Wildfires have also
  • increased, as high temperatures cause
  • forests and fields to become dry and catch on
    fire. Once these are out of control, they can
    destroy everything in their path.

11
Major problems of pollution
  • Burning fossil fuels causes air pollution. Gases
    from cars, factories and even cigarettes all
    contain greenhouse effect gases that cause smog
    and acid rains.
  • Smog is a dense cloud of nitrogen dioxide,
    ozone and other noxious gases that cause
    permanent lesions to the lungs. It also causes
    lethargy, migraines, stress and asthma.

12
  • The greenhouse effect, discovered in 1896 is the
    heating of a planet due to the presence of an
    atmosphere containing gases that absorb the Suns
    heat. Thus, these gases trap heat within the
    atmosphere.

13
  • Global warming is considered by some scientists
    to be an enhanced greenhouse effect.

14
  • Factories are polluting our air, our soil and our
    waters more than ever before. Factory pollution
    is considered as the number one source of
    pollution in the world.

15
Overpopulation
  • Overpopulation is one of the most important
    factors of global warming. More people means more
    demand for fuels, food and energy, and thus,
    fresh water supplies run even lower, world hunger
    continues and fossil fuel usage increases even
    further.

16
  • Other effects of overpopulation include
    deforestation to acommodate larger urban areas,
    which inevitably leads to mass extinctions,
    pollution increasing even more, increased chances
    of disease pandemics, poverty and starvation.

17
  • The list continues low life expectancies, poor
    hygienic conditions, restrictive laws, and
    finally, increased levels of warfare.

18
Diseases
  • As a result of global warming, the odds of
    massive pandemics have increased. Not only do
    higher water levels allow for some waterborne
    diseases (cholera, typhoid fever), but
    insect-borne diseases such as malaria (which may
    be spreading as far north as the United Kingdom
    and Scandinavia) and encephalitis can spread to
    other areas due to higher temperatures.

19
Mass extinctions
  • Since the dawn of man, and Earth itself, plant
    and animal species have always been disappearing.
    But now, species all around the Earth are
    disappearing a thousand times faster than they
    should be. The destruction of animal habitats,
    can lead to extreme meteorological conditions,
    higher temperatures, and animal extinctions in
    the first place. Over 16000 plant and animal
    species are, at this very moment, in danger of
    extinction.

20
What can we do?
  • If we do not act now, our planet could soon
    become a barren wasteland. Here is a list of
    things that we can do to prevent this possibility.

21
Using alternative ways of transportation
  • Exhaust gases from cars produce almost a quarter
    of all CO2 released in the atmosphere. As more
    and more people buy their own cars, greenhouse
    gas emissions increase. If we use public
    transportation, bicycles, or just walk, we can
    help decrease these emissions.

22
Support alternative energies
  • Engineers are designing amazing new energies and
    fuels for our vehicles. We can support them by
    buying their products, such as hybrid cars, and
    other revolutionary new vehicles.

23
Save energy
  • Many people underestimate the importance of using
    less electricity, when in fact its the first
    thing we should do. Using a fluorescent
    light-bulb can save 135 kilograms of CO2 every
    year. Other small things, such as completely
    shutting down or even unplugging television sets
    and other electronic devices.

24
Save water
  • Saving water allows for the energy that goes into
    collecting it and cleaning it to be saved. Even
    the smallest drop of water can help fight against
    global warming.

25
The end
  • The fate of our planet depends on us solving our
    climate problems. If we dont reduce quantities
    of greenhouse gases and start using renewable
    energies, we might lose our planet for good.
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